Mutarotation

Danielle Thibeadeaux
Flashcards by Danielle Thibeadeaux, updated more than 1 year ago
Danielle Thibeadeaux
Created by Danielle Thibeadeaux over 7 years ago
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Mutarotation The change in specific rotation(increase or decrease) toward equilibrium
Solutions of D-(+)-glucose give no observable ___ or ___ absorption band for a carbonyl group. Solutions of D-(+)-glucose give no observable UV or IR absorption band for a carbonyl group.
Solutions of D-(+)-glucose give a _______ test with Schiff's reagent. Which is a special reagent that requires high ________ of a free __________ (rather than a ________) in order to give a positive test. Solutions of D-(+)-glucose give a negative test with Schiff's reagent. Which is a special reagent that requires high concentration of a free aldehyde(rather than a hemiacetal) in order to give a positive test
D-Mannose favors which anomeric orientation? What is this known as ? Alpha The anomeric effect.
What is the anomeric effect? It is believed to be cause by hyper conjugation(is the interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non-bonding p-orbital, antibonding π orbital, or filled π orbital, to give an extended molecular orbital that increases the stability of the system) where an axial oriented orbital associated with the non bonding electrons of the ring oxygen can overlap with a sigma orbital of the axial C-O hemiacetal bond.
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